php - 如何解析 <a name 和 <image src= inside <li tag using php?

Question

我得到了一个包含大量 <li> .. </li> 集的 html 字符串。我想从每组 <li> ...</li> 中解析以下数据:

   1: call.php?category=fruits&fruitid=123456
   2: mango season
   3: http://imagehosting.com/images/fru_123456.png

我使用 preg_match_all 获取第一个值，但如何获取第二个和第三个值？ 如果有人告诉我得到第二和第三项，我会很高兴。提前致谢。

PHP:

preg_match_all('/getit(.*?)detailFruit/', $code2, $match);

var_dump($match);

  // iterate the new array
  for($i = 0; $i < count($match[0]); $i++)
{
$code3=str_replace('getit(\'', '', $match[0]);
$code4=str_replace('&amp;\',detailFruit', '', $code3);
echo "<br>".$code4[$i];
}

示例 <li> ..</li> 数据:

<li><a id="FR123456" onclick="setFood(false);setSeasonFruitID('123456');getit('call.php?category=fruits&amp;fruitid=123456&amp;',detailFruit,false);">mango season</a><img src="http://imagehosting.com/images/fru_123456.png">
            </li>

编辑:我使用 DOM 现在我得到了 2 和 3 值如何使用 DOM 获得第一个值？

libxml_use_internal_errors(true);
$dom = new DOMDocument;
$dom->loadHTML($code2);
$xpath = new DOMXPath($dom);

// Empty array to hold all links to return
$result = array();

//Loop through each <li> tag in the dom
foreach($dom->getElementsByTagName('li') as $li) {
    //Loop through each <a> tag within the li, then extract the node value
    foreach($li->getElementsByTagName('a') as $links){
        $result[] = $links->nodeValue;
        echo $result[0] . "\n";
    }

    $imgs = $xpath->query("//li/img/@src");

foreach ($imgs as $img) {
    echo $img->nodeValue . "\n";
}
}

Answer 1

有趣的问题:-) 下面的解决方案使用 DOMDocument/SimpleXML 的组合来轻松获取值 2 和 3。 DomDocument 被用作您的 HTML 片段已损坏。要从 JavaScript 内容中实际获取链接(值 1)，使用了一个简单的正则表达式:

~getit\('([^']+)'\)~
# search for getit( and a singlequote literally
# capture everything up to (but not including) a new single quote
# this is saved in the group 1

完整的演练可以在下面找到(显然我编造了 banana 部分):

<?php
$html = '<ul>
<li><a id="FR123456" onclick="setFood(false);setSeasonFruitID(\'123456\');getit(\'call.php?category=fruits&amp;fruitid=123456&amp;\',detailFruit,false);">mango season</a><img src="http://imagehosting.com/images/fru_123456.png"></li>
<li><a id="FR7890" onclick="setFood(false);setSeasonFruitID(\'7890\');getit(\'call.php?category=fruits&amp;fruitid=7890&amp;\',detailFruit,false);">bananas</a><img src="http://imagehosting.com/images/fru_7890.png"></li>
        </ul>';

$dom = new DOMDocument;
$dom->strictErrorChecking = FALSE;
$dom->loadHTML($html);
$xml = simplexml_import_dom($dom);

# xpath to find list items
$items = $xml->xpath("//ul/li");

$regex = "~getit\('([^']+)'\)~";

# loop over the items
foreach ($items as $item) {
    $title = $item->a->__toString();
    $imgLink = $item->img["src"];

    $jsLink = $item->a["onclick"];

    preg_match_all($regex, $jsLink, $matches);
    $jsLink = $matches[1][0];

    echo "Title: $title, imgLink: $imgLink, jsLink: $jsLink\n";
    // output: Title: mango season, imgLink: http://imagehosting.com/images/fru_123456.png, jsLink: call.php?category=fruits&fruitid=123456&
    //         Title: bananas, imgLink: http://imagehosting.com/images/fru_7890.png, jsLink: call.php?category=fruits&fruitid=7890&
}

?>